The Mystic Majestic X is the ultimate kiteboarding harness. This is a hard-shell harness that has gone through 1000s of hours of testing and numerous prototypes so you know you're getting the best available. It has a patented Full Carbon Bionic Core Frame, whose design and material ensures the harness is stiff in the horizontal direction but able to twist, adjust and follow your body movements. The harness also features V-Foam - intelligent Viscoelastic Foam which sets to your body shape, ensures maximum comfort and keeps the harness in place where you want it. Get in quick if you want one though - there is currently limited worldwide availability.
Other features of the Majestic X harness include: a 4-strap power buckle adjustment and tightening system which keeps the spreader bar tight to your body and stops it riding up due to the pull of the kite; Mystic's Battle Belt waist closure system which adjusts to fit your body shape; soft neoprene edges which help make this harness super-comfortable; the Clickerbar 4.0 which has been updated so it's super-easy to open and close; a leash eye at the front which allows you to use a short leash and easily reach the quick release; a key pocket; thermoformed EVA foam which grips your waist; and a safety knife tucked within reach just below the hook.
Check out this review of the fantastic Mystic Majestic X: IKSurfMag